/** {@inheritDoc} */
protected void addLiteral(Literal literal) throws IOException {
s.append(i(4)).append("<literal");
if (literal.getLanguage() != null)
s.append(" xml:lang=\"").append(literal.getLanguage()).append("\"");
else if (literal.getDatatype() != null)
s.append(" datatype=\"").append(literal.getDatatype().toString()).append("\"");
s.append(">").append(StringUtil.quoteAV(literal.getLexicalForm())).append("</literal>");
}
